Portable clock



(Model.) 2 Sheets-Sheet 1.

D. A. A. BUCK. Portable Clock.

No. 240,379. Patented April 19,1881.

2 Sheets-Sheet 2.

imbdel.)

D. A. A. BUCK. Portable Clock.

Patented April 19,1881.

MIETEN; PHOTO-LITHOGRAPNER. wASmNGToN. D C.

UNITED STATES PATENT OrinCE.

D. AZRO A. BUCK, OF WATERBURY, CONNECTICUT.

PORTABLE CLOCK.y

SPECIFICATION forming part of Letters Patent No. 240,379, dated April 19, 1881. Application filed April 12, 1880. (Model.)

To all whom it may concern:

Be it known that I, D. Azno A. BUCK, of Waterbury, in the county of New Haven, and in the State of Connecticut, have invented certain new and useful Improvements in Portable Clocks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in Which- Figure 1 is a perspective view of the rear side of the case of my clock. Fig. 2 is a like view of the front side of the back plate. Fig. 3 is a vertical section upon line x x of Fig. 1. Fig. 4 is a like View upon line y y of Fig. 3; and Fig. 5 is a perspective ,view of the upper end of one of the pillars and the connecting portion ofthe top plate, and shows the means used for insuring the circumferential position of said pillars.

Letters of like naine and kind refer to like parts in each of the figures.

The design of my invention is to simplify the construction, to increase the efficiency, and to lessen the cost of portable clocks 5 to which end it consists, principally, in a portable clock provided with a back case plate, which tits between the pillars of the case, and also serves as a movement-plate, substantially as and for the. purpose hereinafter specified.

It consists, further, in a mainspring barrel adapted to rotate around and to wind the spring, and provided with a hub which passes through the back plate, and has attached thereto a key, substantially as and for the purpose hereinafter set forth.

It consists, further, in a potance or bearing for the main journal, attached to or secured upon the back plate, substantially as and for the purpose hereinafter specified.

It consists, tinally, in the means employed for insuring the circumferential position of the pillars, substantially as and for the 'purpose hereinafter shown.

In the annexed drawings, A represents the base, and B the top,of my case, between which, at the corners, extend four pillars, C, that secure said parts firmly in relative position.

Between the rear pillars, C, and the base A and top B is placed a plate, D, which, at its side edges, fits into grooves c provided within said pillars, and is thus held iirmly in place.

Within the contiguous sides of the pillars C are formed longitudinal grooves c', which correspond to the grooves c of the back pillars, and receive the edges of plates of glass that inclose Lthe sides and front of the casing and exclude dust, while permittin g the interior of the same to be seen.

In order that the pillars C may be securely held in position circumferentially to receive the glass sides and front, an inwardly-projecting teat or lug, b', is left in cutting each opening b within the plate B, for the reception of the rod C, that passes through said plate and pillar, and said lug is afterwardl bent downward and outward, so as to be entirely below said plate B and at one side of said opening b, as seen in Fig. 5. A recess, c2, provided in the upper end ofthe pillar C, midway between its grooves c, engages with the lug b and prevents said pillar from moving circumferentially in either direction.

Just in rear of the front pillars, C, is placed a plate, E, which corresponds in size and shape with the plate D, and is secured to the latter by means of four pillars, F, that extend between the corners of said plates.

The plates D and E serve as the back and front plates, respectively, of the movement or train G, which latter, except the nia-inspringbarrel, is journaled cen trally at its front within an opening, c, provided in said plate E, and at its rear within a potance, H, that is secured to and extends forward from said back plate and receives the pivot g of the main journal.

The potance H has such dimensions as to give all necessary rigidity, so that the main journal has as firm a bearing as though journaled at the same point within the back plate, D, a result not possible to be attained were said back plate situated at the distance shown in rear of the train` and said main journal extended rearward to and journaled within it.

The main or spring wheel I is secured upon and rotates with a shaft, K, that extends between and is journaled within the plates D and E, below the movement Gr, said wheel being so arranged as to mesh with a pinion, g', that is provided upon the main journal immediately in front ofthe pivot g.

Surrounding the shaft K, between the main wheel I and the back plate, D, is a spring-bar rel, L, which is open upon the side next to said IOO lkey, M, is

Wheel, and at its opposite rear side is provided with a hub, l, that extends through a corresponding opening in said back plate, and to or upon its rear end has secured a key, M, the arrangement being such as to cause said hub to form an axial bearing for said barrel. A central opening, l', in said hub l furnishes a bearing for the rear pivot of said shaft.

The mainsprin g M has its inner end attached to the shaft K and its outer end attached to the inner side of the barrel L, While upon the periphery of the latter are provided ratchetteeth Z2, that are engaged by a spring-pavvl, N, so that if said barrel is rotated said spring will be Wound up, and its power, through said shaft K and main wheel I, will be transmitted to the train.

In order that a permanentlyattached key may be employed for Windin g the mainsprin g without inconvenience from its projection from the rear side of the ease, the back plate, D, is provided with a circular recess, d, immediately opposite to the spring-barrel L, which recess is formed by stamping or pressing the metal forward at such point, as shown by Figs. 3 and 5.

Within the recess l thus formed a two-armed secured to or upon the projecting end of the hub l of the barrel L, which key is provided upon each of its. arms with a rearward-projecting Win g, m, and is formed from one piece by casting, stamping, &e. rIhe center of said key has a hub, m', which fits over a reduced portion of said hub Z, so as to insure the radial relative positions of said parts.

The projection upon the front face of the back plate, D, enables the use of a short shaft, K, and serves to give a more central position to the springbarrel L and main Wheel I than would otherwise be practicable without the employment of an especial bearing for the rear pivot of said shaft.

Having thus fully set forth the nature and merits of my invention, what I claim as new l. A portable clock provided with a back case-plate, which fits between the pillars of the case, and also serves as a movement-lume, substantially as and for the purpose specified.

2. A niainspring-barrel adapted to rotate around and to wind the spring, and provided with a hub which passes through the back plate and has attached thereto a key, substantially as and for the purpose set forth.

3. A potance or bearing for the main journal, attached to or secured upon the back plate, substantially as and for the purpose specified.

4. As a means for insuring the cirou1nferential position of the pillar C, the recess c?, provided within its upper end, in combination with the lug b', formed upon and projecting downward from the plate B, substantially as shown.

In testimony that I claim the have hereunto set my hand this March, 1880.

foregoing I 27th day of D. AZRO A. BUCK.

Witnesses:

Jas. E. HUToHnvsoN, HENRY O. HAZARD. 

